If you've been on the look out for a challenging puzzle game that'll train your logical reasoning and make you smarter, you may want to check out Oh! Cube, which launched on Apple's App Store today.

Your aim in this Picross 3D-esque title is to use your logic - and a bunch of tools - to unearth hearts, puppies, Superman, bikinis, and a whole range of other items that are hidden behind numbered cubes.

There are more than 100 different stages for you to complete - all of which house 3D models that you can store in a "beautiful" treasure chest. Plus, more levels will be added to the mix in free updates.

Oh! Cube is currently available to download for the iPhone, iPod touch, and iPad as a Universal app for 69p / 99c, but this price is for a limited time only.